US5564038A - Method and apparatus for providing a trial period for a software license product using a date stamp and designated test period - Google Patents
Method and apparatus for providing a trial period for a software license product using a date stamp and designated test period Download PDFInfo
- Publication number
- US5564038A US5564038A US08/246,648 US24664894A US5564038A US 5564038 A US5564038 A US 5564038A US 24664894 A US24664894 A US 24664894A US 5564038 A US5564038 A US 5564038A
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- United States
- Prior art keywords
- test period
- date stamp
- timer
- computer program
- software
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001186 cumulative effect Effects 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000004590 computer program Methods 0.000 claims description 27
- 238000012545 processing Methods 0.000 claims description 11
- 230000036316 preload Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
Definitions
- the invention relates generally to the field of digital data processing systems, and more specifically to a method for managing access to, and authentication of, an operating system or various application software program products which may be processed by the systems to ensure that the operating system or application software program products are used according to the terms of the product's license agreements.
- a developer may offer the user a "trial period" during which the user is granted the right to use the operating system or application software product. Upon expiration of the trial period, the user may either license the product or stop using the product.
- preloaded systems may be marketed as "turn-key” solutions, whereby the user is not required to install the software product(s) and may begin useful operation shortly after turning the system on.
- preloaded software products may be used by a software vendor as a method of introducing the user to a particular software product(s), which the user may purchase upon the expiration of a trial period.
- U.S. Pat. No. 5,014,234 to Edwards is for a System with Software Usage Timer and Counter for Allowing Limited Use But Preventing Continued Unauthorized Use Of Protected Software.
- Edwards discloses providing a clock having an initial time setting at the time of installation of a software product on a computer system, a constant representing a predetermined amount of time, and a counter. Each time the protected software is operated, the counter is incremented. Determinations are made whether the counter has reached a predetermined value, or whether the current time sensed exceeds the time when the software was installed by an amount equal to or greater than the constant. If the result of either determination is true, a warning is sent to the user and the counter is decremented each further time that the software is subsequently operated. Finally, the software is disabled when the counter has reached a second predetermined value.
- the system as disclosed in Edwards may fail to provide the user an adequate trial period for a system having a software product(s) that have been preloaded. That is, when preloading software products, Edwards would begin to track a user trial period at the time of preloading. As a result, the length of the trial period realized may be less than the length of the trial period designated by the developer. It is envisioned that no trial period could result in a circumstance when the time at which the computer system is purchased and activated by a user exceeds the time at which the software products were preloaded by an amount greater or equal to the test period.
- a method and apparatus are provided for preventing continued use of a protected computer program product in a data processing system beyond a designated test period.
- the data processing system includes a date stamp, and timer, wherein the date stamp represents the start of the designated test period, and the timer measures elapsed time after the protected computer program product is installed and before the commencement of the designated test period.
- a determination is made as to whether the date stamp has been created. If the date stamp has been created a determination is made as to whether the current date exceeds the date associated with the date stamp by an amount greater than the designated test period; and if the designated test period is exceeded the protected computer program is disabled.
- the timer is incremented in order to measure elapsed time of the data processing system while active.
- a determination whether the timer has reached a predetermined value is made and after the predetermined value has been reached, the date stamp is created. After the date stamp has been created the system compares the current date to the date associated with the date stamp, and if the designated test period is exceeded the protected computer program is disabled.
- FIG. 1 shows a personal computer comprising a system unit, keyboard, mouse and display.
- FIG. 2 shows a block diagram of the components of the personal computer shown in FIG. 1.
- FIG. 3 shows a computer system with in-memory components for allowing a trial period according to the present invention.
- FIG. 4 is a flow chart illustrating a method for allowing a trial period according to the present invention.
- the invention may be run on a variety of computers under a number of different operating systems.
- the computer could be, for example, a personal computer, a mini computer, or a main frame computer.
- the computer may be a standalone system, part of a network such as a local area network or wide area network or a larger teleprocessing system.
- the invention is described as implemented on a personal computer, such as IBM's PS/2® computer series, although the specific choice of computer is limited only by memory and disk requirements.
- FIG. 1 there is shown a personal computer system 10, comprising a system unit 11, a keyboard 12, a mouse 13 and a graphics display device or monitor 14.
- the keyboard 12 and the mouse 13 constitute user input devices, and the display device 14 is a user output device.
- the mouse 13 is used to control a cursor 15 displayed on the screen 16 of the display device 14.
- FIG. 2 shows in block diagram form the components of the personal computer shown in FIG. 1.
- the system unit 11 includes a system bus 21 to which the various components are attached and by which communication between the various components is accomplished.
- a microprocessor 22 is connected to the system bus 21 and is supported by read only memory (ROM) 23 and random access memory (RAM) 24, also connected to system bus 21.
- ROM read only memory
- RAM random access memory
- the microprocessor 22 in the IBM PS/2 series of computers is one of the Intel family of microprocessors including the 80286, 80386 or 80486 microprocessors, but other microprocessors including, but not limited to, Motorola's family of microprocessors such as the 68000, 68020 or 68030 microprocessors and various RISC (Reduced Instruction Set Computer) microprocessors manufactures by IBM, Hewlett-Packard, Sun Microsystems, Intel, Motorola and others may be used in a specific computer.
- RISC Reduced Instruction Set Computer
- the ROM 23 contains, among other code, the Basic Input/Output System (BIOS) which controls basic hardware operations, such as interactions of the disk drives and the keyboard.
- BIOS Basic Input/Output System
- the RAM 24 is the main memory into which the operating system, data files and application programs are loaded.
- a memory management chip 25 is connected to the system bus 21 and controls Direct Memory Access (DMA) operations, including paging data between RAM 24 and a hard disk drive 26 and a floppy disk drive 27.
- DMA Direct Memory Access
- the keyboard controller 28 provides the hardware interface for the keyboard 12, the mouse controller 29, hardware interface for the mouse 13, and the video controller 30 provides the hardware interface for the graphic display device 14.
- FIGS. 1 and 2 The hardware illustrated in FIGS. 1 and 2 is typical but may vary for a specific application; that is, there may be other peripherals, such as optical storage media, audio I/O, printers and the like.
- the invention is specifically directed to an enhancement to the operating system which controls or "runs" the hardware or an application software program which runs under the control of the operating system.
- the invention may be added to an existing operating system or application software program, or it may provide the basis of an entirely new operating system or application software program.
- the manner in which the invention is implemented may differ from operating system to operating system, or from application software program to application software program.
- One possible embodiment is illustrated in FIG. 3.
- the RAM 24 may contain, among other code, operating system 32, one or more application software programs 34, timer 36 for keeping track of cumulative elapsed time that the data processing system 10 is active, and an in-memory model 38 for storing a date stamp.
- the "protected computer program product” may be either operating system 32 or application software product 34, whichever is the product to be protected.
- timer 36 is started and incremented while the data processing system 10 is operated until a predetermined value of time is reached. Having reached the predetermined value, a date stamp is created and stored in in-memory model 38. Thereafter, the current date will be compared to the date associated with the date stamp to establish whether a designated test period has been exceeded. Upon expiration of the designated test period, the computer program may be disabled or destroyed.
- timer 36 and in-memory model 38 are shown as discrete elements in FIG. 3, either may be integral to the protected computer program product. That is, timer 36 or in-memory model 38 representing the date stamp may be functionally part of either operating system 32 or application software product 34. Moreover, the contents of timer 36 and in-memory model 38 are stored, for example on hard disk 26, so as to preserve the contents of each during a first use of the protected computer program product and each subsequent use of the protected computer program product.
- the software which will now be described functions to prevent continued unauthorized use of protected software products beyond a designated test period and to manage access to, and authentication of, the protected software products.
- the method hereinafter described permits copies of software products to be installed on systems, with a predetermined delay before commencement of the test period.
- the predetermined delay provides for a cumulative elapsed time, beginning with the installation of the software product to be evaluated during the test period, to allow for miscellaneous starts of the computer system prior to productive use for the purpose of evaluation during the user trial period.
- the miscellaneous starts may be associated with software product installation procedures during preload activities, attachment of devices and/or adapters to tailor the system to a particular user configuration, or to otherwise "boot” or check the system prior to productive use.
- the flow diagram in FIG. 4 shows a possible mode of operation of the invention.
- the graphical conventions of a diamond for a test or decision and a rectangle for a process or function are observed. These conventions are well understood by programmers skilled in the art, and the flow diagram is sufficient to enable a programmer of ordinary skill to write code in any suitable computer programming language such as BASIC, Pascal, or C for a computer, such as the IBM Personal Series (PS/2) family of computers which supports those languages.
- PS/2 IBM Personal Series
- Block 410 begins, after first entering from block 400, by checking whether a valid password has been entered during the start up or loading of the protected computer program product. The determination may be made by prompting the user to input the valid password every time the protected computer program product is loaded. Alternatively, a register or field for storing the valid password may be examined in order to verify that the valid password had been previously entered by the user and stored. If the valid password has, in fact, been entered, the YES branch of decision block 410 serves as input to block 490, where the procedure exits and continues with loading the protected computer program product. Otherwise, the NO branch of decision block 410 serves as input to decision block 420, where the system determines whether a date stamp has been created.
- Block 440 activates timer 36 to measure time elapsed during the operation of the protected computer program product. It is to be understood, that the time measured by timer 36 begins with the total cumulative elapsed time counted during every prior operation of the protected computer program product.
- timer 36 stores the cumulative time of every prior operation of the protected computer program product, and resumes its count during the current operation of the protected computer program product.
- block 440 serves as input to decision block 450 where it is determined whether timer 36 has reached a predetermined limit. If the predetermined limit has not been reached, the NO branch of decision block 450 is taken to block 490, where the procedure exits and continues with loading the protected computer program product. Otherwise, the YES branch of decision block 450 is taken to block 460, where a date stamp is created.
- the date stamp indicates the time upon which the timer 36 has reached its predetermined value. Accordingly, the date stamp has a date associated therewith, indicating the time at which timer 36 has reached the predetermined value and the time at which an authorized test period is begun.
- timer 36 serves to provide a "burn-in" period to allow a user to start the system 10 prior to undertaking productive use of the protected computer program product in order to perform a meaningful test.
- the authorized test period will begin only after the date stamp is created, and that the date stamp is only created upon the timer 36 reaching the predetermined value.
- timer 36 may be implemented as a discrete hardware component in system 10.
- the predetermined value, for the time of the "burn-in" period is 24 hours.
- the YES branch of decision block 420 and the output of block 460 serve as input to decision block 470, where it is determined whether the time associated with the designated test period has been exceeded.
- the difference between the current date and the date associated with the date stamp is compared to the designated test period.
- the designated test period is set at 60 days. However, the designated test period is typically determined by the developer or according to the terms of the license agreement. If it is determined that the elapsed days do not exceed the designated test period, the NO branch of decision block 470 is taken to block 490, where the procedure exits and continues with loading the protected computer program product. Otherwise, the YES branch of decision block 470 is taken to block 480, where the load procedure stops.
- block 480 includes posting a message to the user that the valid password must be entered in order to access the protected computer program product.
Abstract
Description
Claims (4)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/246,648 US5564038A (en) | 1994-05-20 | 1994-05-20 | Method and apparatus for providing a trial period for a software license product using a date stamp and designated test period |
JP10750995A JP3317323B2 (en) | 1994-05-20 | 1995-05-01 | Method and apparatus for preventing continuous use |
EP95303141A EP0684538B1 (en) | 1994-05-20 | 1995-05-10 | Apparatus and method for software access |
DE69532936T DE69532936T2 (en) | 1994-05-20 | 1995-05-10 | Device and method for accessing software |
US08/671,228 US5771347A (en) | 1994-05-20 | 1996-06-27 | Apparatus and method to allow a user a trial period before licensing a software program product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/246,648 US5564038A (en) | 1994-05-20 | 1994-05-20 | Method and apparatus for providing a trial period for a software license product using a date stamp and designated test period |
Related Child Applications (1)
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US08/671,228 Continuation US5771347A (en) | 1994-05-20 | 1996-06-27 | Apparatus and method to allow a user a trial period before licensing a software program product |
Publications (1)
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US5564038A true US5564038A (en) | 1996-10-08 |
Family
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US08/246,648 Expired - Lifetime US5564038A (en) | 1994-05-20 | 1994-05-20 | Method and apparatus for providing a trial period for a software license product using a date stamp and designated test period |
US08/671,228 Expired - Fee Related US5771347A (en) | 1994-05-20 | 1996-06-27 | Apparatus and method to allow a user a trial period before licensing a software program product |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US08/671,228 Expired - Fee Related US5771347A (en) | 1994-05-20 | 1996-06-27 | Apparatus and method to allow a user a trial period before licensing a software program product |
Country Status (4)
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US (2) | US5564038A (en) |
EP (1) | EP0684538B1 (en) |
JP (1) | JP3317323B2 (en) |
DE (1) | DE69532936T2 (en) |
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JP3317323B2 (en) | 2002-08-26 |
EP0684538B1 (en) | 2004-04-28 |
US5771347A (en) | 1998-06-23 |
DE69532936D1 (en) | 2004-06-03 |
DE69532936T2 (en) | 2005-06-23 |
EP0684538A1 (en) | 1995-11-29 |
JPH07319689A (en) | 1995-12-08 |
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